IOTA/IOTA-ES occultation update for (1345) Potomac / TYC 6304-01038-1 event on 2022 Nov 02, 07:59 UT Visible from New Zealand Summary ------- On 2022 Nov 02 UT, the 73.3 km diameter asteroid (1345) Potomac will occult a 10.9 mag star in the constellation Sagittarius for observers along a path across New Zealand. In the case of an occultation, the combined light of the asteroid and the star will drop by 6.54 mag to 17.47 mag (the magnitude of the asteroid) for at most 3.040 seconds. This update is based on, astrometry for the asteroid kindly provided by the IAU Minor Planet Center. This work has made use of data from the European Space Agency (ESA) mission Gaia (http://www.cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC, http://www.cosmos.esa.int/web/gaia/dpac/consortium). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. The event at a glimpse ---------------------- * Rank: 81 * date and approx. time of event: 2022 Nov 02, 07:55 - 2022 Nov 02, 08:03 * geocentric midpoint of event [JD]: 2459885.83296150 * magnitude of target star: 10.93 * magnitude drop [mag]: 6.54 * estimated maximum duration [s]: 3.040 * Moon: 62 % sunlit, 37° distance * Sun: 68° distance * rough path description: New Zealand The occultation path -------------------- * approximate projected width [km]: 83 * 1 sigma uncertainty interval [path widths]: +/- 0.66 * 1 sigma uncertainty interval [seconds]: +/- 2.4 * 1 sigma uncertainty interval approx RA,DE ["]: (+/- 0.016, +/- 0.013) * 1 sigma uncertainty ellipse (major, minor, PA): (0.016", 0.013", 95°) * approx speed of asteroid's shadow [km/s]: 24.1222 * website for maps: http://www.asteroidoccultation.com Path Coordinates: Occultation of TYC 6304-01038-1 by 1345 Potomac on 2022 Nov 2 Centre Star Star Sun Path Limits Error Limits Alt E. Longitude Latitude U.T. Alt Az Alt Limit 1 Limit 2 Limit 3 Limit 4 Crn o ' " o ' " h m s o o o o ' " o ' " o ' " o ' " Latitude Latitude Latitude Latitude 30 0 0 -24 31 47 7 55 33.8 1 110 63 -24 55 53 -24 7 47 -25 27 44 -23 36 21 .... 31 0 0 -24 52 38 7 55 33.9 2 110 64 -25 16 45 -24 28 37 -25 48 37 -23 57 10 0.46 32 0 0 -25 13 32 7 55 34.1 3 110 64 -25 37 40 -24 49 30 -26 9 33 -24 18 2 0.49 33 0 0 -25 34 28 7 55 34.4 4 109 65 -25 58 37 -25 10 25 -26 30 31 -24 38 56 0.50 34 0 0 -25 55 26 7 55 34.8 5 109 66 -26 19 36 -25 31 22 -26 51 30 -24 59 52 0.51 35 0 0 -26 16 25 7 55 35.3 6 108 66 -26 40 35 -25 52 21 -27 12 31 -25 20 50 0.51 36 0 0 -26 37 25 7 55 35.8 7 108 67 -27 1 36 -26 13 20 -27 33 32 -25 41 48 0.51 37 0 0 -26 58 25 7 55 36.4 8 107 68 -27 22 36 -26 34 19 -27 54 33 -26 2 47 0.52 38 0 0 -27 19 25 7 55 37.1 8 107 68 -27 43 36 -26 55 19 -28 15 34 -26 23 46 0.52 39 0 0 -27 40 24 7 55 37.9 9 106 69 -28 4 36 -27 16 17 -28 36 34 -26 44 44 0.52 40 0 0 -28 1 21 7 55 38.7 10 106 69 -28 25 34 -27 37 14 -28 57 32 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99 72 -32 52 16 -32 4 2 -33 24 11 -31 32 32 0.52 54 0 0 -32 47 55 7 55 58.5 23 98 72 -33 12 4 -32 23 51 -33 43 58 -31 52 22 0.52 55 0 0 -33 7 35 7 56 0.4 24 97 72 -33 31 43 -32 43 32 -34 3 36 -32 12 3 0.53 56 0 0 -33 27 6 7 56 2.3 25 97 71 -33 51 14 -33 3 4 -34 23 6 -32 31 37 0.53 57 0 0 -33 46 28 7 56 4.3 26 96 71 -34 10 35 -33 22 27 -34 42 26 -32 51 1 0.53 58 0 0 -34 5 41 7 56 6.4 27 95 71 -34 29 47 -33 41 41 -35 1 37 -33 10 16 0.53 59 0 0 -34 24 44 7 56 8.5 28 95 70 -34 48 49 -34 0 45 -35 20 37 -33 29 22 0.53 60 0 0 -34 43 37 7 56 10.7 28 94 70 -35 7 41 -34 19 39 -35 39 27 -33 48 17 0.53 61 0 0 -35 2 20 7 56 13.0 29 93 69 -35 26 22 -34 38 23 -35 58 7 -34 7 2 0.53 62 0 0 -35 20 51 7 56 15.2 30 93 69 -35 44 52 -34 56 55 -36 16 36 -34 25 36 0.53 63 0 0 -35 39 11 7 56 17.6 31 92 68 -36 3 11 -35 15 17 -36 34 53 -34 43 59 0.53 64 0 0 -35 57 20 7 56 19.9 32 91 68 -36 21 19 -35 33 27 -36 52 59 -35 2 11 0.53 65 0 0 -36 15 17 7 56 22.4 33 90 67 -36 39 14 -35 51 25 -37 10 52 -35 20 11 0.53 66 0 0 -36 33 2 7 56 24.8 33 90 67 -36 56 58 -36 9 12 -37 28 34 -35 37 59 0.53 67 0 0 -36 50 34 7 56 27.3 34 89 66 -37 14 29 -36 26 45 -37 46 3 -35 55 35 0.53 68 0 0 -37 7 54 7 56 29.9 35 88 66 -37 31 47 -36 44 7 -38 3 19 -36 12 58 0.53 69 0 0 -37 25 1 7 56 32.5 36 87 65 -37 48 52 -37 1 15 -38 20 22 -36 30 9 0.53 70 0 0 -37 41 55 7 56 35.1 37 86 64 -38 5 44 -37 18 10 -38 37 12 -36 47 6 0.53 71 0 0 -37 58 35 7 56 37.7 37 85 64 -38 22 23 -37 34 52 -38 53 49 -37 3 50 0.53 72 0 0 -38 15 1 7 56 40.4 38 85 63 -38 38 48 -37 51 21 -39 10 11 -37 20 20 0.53 73 0 0 -38 31 14 7 56 43.2 39 84 62 -38 54 59 -38 7 35 -39 26 20 -37 36 37 0.53 74 0 0 -38 47 13 7 56 45.9 40 83 62 -39 10 56 -38 23 35 -39 42 15 -37 52 40 0.53 75 0 0 -39 2 57 7 56 48.7 40 82 61 -39 26 38 -38 39 22 -39 57 55 -38 8 28 0.53 76 0 0 -39 18 27 7 56 51.5 41 81 60 -39 42 7 -38 54 53 -40 13 21 -38 24 2 0.53 77 0 0 -39 33 43 7 56 54.4 42 80 59 -39 57 20 -39 10 11 -40 28 32 -38 39 22 0.53 78 0 0 -39 48 43 7 56 57.2 43 79 59 -40 12 19 -39 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0 -31 55 57 8 3 17.0 11 254 -40 -32 20 7 -31 31 52 -32 52 3 -31 0 21 0.57 -144 0 0 -31 35 53 8 3 17.9 10 254 -40 -32 0 4 -31 11 48 -32 32 0 -30 40 16 0.57 -143 0 0 -31 15 42 8 3 18.7 9 253 -41 -31 39 54 -30 51 37 -32 11 51 -30 20 4 0.57 -142 0 0 -30 55 26 8 3 19.4 8 253 -42 -31 19 37 -30 31 20 -31 51 35 -29 59 47 0.58 -141 0 0 -30 35 3 8 3 20.0 7 252 -42 -30 59 15 -30 10 57 -31 31 13 -29 39 24 0.59 -140 0 0 -30 14 35 8 3 20.5 6 252 -43 -30 38 47 -29 50 29 -31 10 45 -29 18 55 0.59 -139 0 0 -29 54 2 8 3 21.0 5 251 -43 -30 18 15 -29 29 56 -30 50 13 -28 58 22 0.61 -138 0 0 -29 33 25 8 3 21.4 4 251 -44 -29 57 37 -29 9 18 -30 29 36 -28 37 45 0.62 -137 0 0 -29 12 44 8 3 21.7 3 250 -45 -29 36 56 -28 48 37 -30 8 55 -28 17 3 0.65 -136 0 0 -28 51 59 8 3 22.0 2 250 -45 -29 16 11 -28 27 52 -29 48 10 -27 56 19 0.70 -135 0 0 -28 31 11 8 3 22.1 1 249 -46 -28 55 24 -28 7 5 -29 27 22 -27 35 32 0.83 -134 0 0 -28 10 21 8 3 22.2 0 249 -46 -28 34 33 -27 46 15 -29 6 31 -27 14 42 1.57 Uncertainty in time = +/- 2 secs Prediction of 2022 Oct 17.0 Data for the target star ------------------------ * name: TYC 6304-01038-1 * constellation : Sagittarius * BCRS position with proper motion to date of event [h,m,s ; °,',"] RA: 19 12 32.2095 DE: -18 49 48.269 * GCRS Astrometric position with proper motion and parallax to date of event [h,m,s ; °,',"] RA: 19 12 32.2094 DE: -18 49 48.269 * position source: Gaia EDR3 * standard error: RA,DE [mas]: (0.100,0.100) * V mag [mag]: 10.9 * Diameter [mas]: 0.00 * remarks: Data for the minor planet ------------------------- * general information: (number) name: (1345) Potomac asteroid class: approx. diameter [km]: 73 approx. diameter ["]: 0.020 distance from Earth [AU]: 4.97980 asteroid position offset in RA [mas]: 0 asteroid position offset in DE [mas]: 0 * orbital information: orbit source: JPL#52 date of fit: 2022 Sep 23 source of used astrometry: MPC, JPL number of used observations: 0 number of rejected observations: 0 time covered by the observations: 1800 Jan 01 - 1800 Jan 01 1 sigma uncertainty ellipse (major, minor, PA): 0.016", 0.013", 94.74° remarks: * orbital elements for (1345)Potomac : Mean anomaly = 191.2548902401 deg Arg. of pericenter = 332.7369282416 deg Long. of node = 137.4309777201 deg Inclination = 11.4032144758 deg Eccentricity = 0.1812031335 Semimajor axis = 3.9818575818 AU Perihelion dist = 3.2603325109 AU Mag: H = 9.93, G = 0.15 Epoch of elements : MJD 59885.33305555 TDT (2022 Nov 02.3331) ------ occelmnt file for Occult BEGIN ----------------------------------- JPL#522022Sep23,3.04,2022,11,2,7.991076,-0.016844,-0.462423,13.606901,-0.476819,0.005519,0.000850,-0.000001,0.000000 127.0184,-18.7924,56.03,-14.78,False TYC 6304-01038-1,19.20894708,-18.8300747,0.00,10.93,0.00,0.0,0,,19.23079910,-18.7923569,6.54,0.00,0,0,1 1345,Potomac,17.47,73.3,4.9798,0,0,1.692,-0.84,,4.8,0 0,191.2136,2022,11,2,332.7369,137.4310,11.4032,0.18120,3.98186,3.26033,9.93,5.0,0.15 1.657,0.0163,0.0133,95,0.0133,Known errors,-1.00,-1,-1,-1 20221102_1038-1,59868.96 ------ occelmnt file for Occult END ----------------------------------- ============================================ Calculator (s): Steve Preston Date of update: 2022 Oct 16, 23:09 UT Steve Preston 7640 NE 32nd St Medina, WA 98039 stevepr@acm.org